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PPSC · PMS Punjab 2019

Chemistry, Paper I

100 marks · 3 hours · 8 questions
This paper Chemistry · all yearsQ. 1 · What is meant by corrosion?…Q. 2 · Define the following: i. Millimole…Q. 3 · Differentiate between K₄[Fe(CN)₆] and [Fe(H₂O)₆]SO₄…Q. 4 · Define pollutant. How it produces…Q. 5 · How will you prove "Hψ…Q. 6 · Define thermodynamics and enthalpy. Prove…Q. 7 · Define hybridization and give examples.…Q. 8 · Discuss the nature of Alpha…With this paper← 20172019 →
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Q. 1
  1. (a)What is meant by corrosion? How it can be explained electrochemically? Also list methods to avoid them. [10]
  2. (b)Define Gibbs free energy. How it can be related to equilibrium constant? Derive the relationship. [10]
(20)
Q. 2
  1. (a)Define the following: i. Millimole ii. Equivalent iii. Tunneling effect iv. Potential v. Entropy [10]
  2. (b)Derive the equation of wave function for a particle moving in one dimension. [10]
(20)
Q. 3
  1. (a)Differentiate between K₄[Fe(CN)₆] and [Fe(H₂O)₆]SO₄ on the basis of CFT. Also explain the distortion present in copper complexes. [10]
  2. (b)Write down postulates of VBT in case of transition metal compounds. Also comment, why ClO₄⁻¹ and H₂SO₄ has the same geometry. [10]
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Q. 4
  1. (a)Define pollutant. How it produces adverse effect on living organisms and imbalance in the environment? [10]
  2. (b)Explain briefly the advantage and disadvantage of supplying sewage and sludge to the agriculture soil. [10]
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Q. 5
  1. (a)How will you prove "Hψ = Eψ" by the Schrodinger wave equation? [10]
  2. (b)Briefly, explain the followings: [10]
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Q. 6
  1. (a)Define thermodynamics and enthalpy. Prove First law of thermodynamics by mathematical formulation. [10]
  2. (b)Explain the followings: (i) Gibbs free energy and its applications in different process (ii) Change in enthalpy (AH) and relationship with change in energy (AE) [10]
(20)
Q. 7
  1. (a)Define hybridization and give examples. Write down the rules of hybridization and explain SP hybridization and SP³ hybridization. [10]
  2. (b)Describe the main postulates of Molecular Orbital Theory. Give its application in heteronuclear diatomic molecules with two examples. [10]
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Q. 8
  1. (a)Discuss the nature of Alpha (α) rays and Gamma rays (γ). Describe the kinetic study of radioactive decay. Give example. [10]
  2. (b)Define pollution, pollutants and contaminants. Describe the source, effects and control of carbon monoxide as pollutant. [10]
(20)

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The 2019 PMS Punjab Chemistry paper set by the PPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.

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